Portion of a protective helmet



FIG. 1 is a perspective view of a portion of a protective helmet showingour new design;

FIG. 2 is a rear view of the portion of a protective helmet of FIG. 1;

FIG. 3 is a front view of the portion of a protective helmet of FIG. 1;

FIG. 4 is a top view of the portion of a protective helmet of FIG. 1;

FIG. 5 is a bottom view of the portion of a protective helmet of FIG. 1;

FIG. 6 is a right side view of the portion of a protective helmet ofFIG. 1;

FIG. 7 is a left side view of the portion of a protective helmet of FIG.1;

FIG. 8 is another left side view of the portion of a protective helmetof FIG. 1 shown in a used condition mounted to a tensioning unit for asupporting band of the protective helmet shown in broken lines;

FIG. 9 is a rear view of the portion of a protective helmet of FIG. 1shown in a used condition mounted to a tensioning unit for a supportingband of the protective helmet shown in broken lines; and,

FIG. 10 is a bottom perspective view of the portion of a protectivehelmet of FIG. 1 shown in a used condition mounted to a tensioning unitfor a supporting band of the protective helmet shown in broken lines.

The tensioning unit for a supporting band shown in broken lines in FIGS.8-10 form no part of the claimed design.

CLAIM The ornamental design for a portion of a protective helmet, asshown and described.